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TOM NEWBY SCHOOL EXAMINATION
Subject Natural Sciences Examiner Mrs Fourie, Mr HudsonDate 14 November 2017 Total marks 100Session 1 Duration 1½ hoursGrade 7 Moderator Mrs FourieSpecial instructions/Equipment
Use grey pencil for drawings.1. Answer all questions on the question paper.2. Write neatly and legibly.3. Take note of mark allocation.4. Think before you INK!5. Check your answers when you are done.
This assessment has been compiled using notes and information contained in the Tom Newby School resource material. The marking memorandum has been compiled accordingly. While alternative responses will be given due acknowledgement, the official memorandum will be considered a priority document to ensure uniformity of marking.
Name: Surname: Class:
QUESTION 1 – CHOOOSE THE CORRECT ANSWER (10)Choose the correct answer from the word/s in brackets. Write down the chosen word/s
next to the given number.
1. A burning fire radiates (heat and light energy)/ (heat and flame) energy.
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2. Earth remains tilted on its axis as it revolves in its (revolution)/ (orbit).
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3. Oil forms from the remains of (dead plants)/ (sea animals).
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4. Day is (always)/ (never) longer than night at the equator.
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5. In the water cycle, the sun’s energy is used for (condensation)/ (evaporation).
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6. A microwave warms food by (warmth and light)/ (by radiation).
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7. A bent ruler has (elastic potential energy)/ (elastic kinetic energy).
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8. A torch battery, inserted into a torch, creates a (biological)/ (chemical) reaction,
which releases electrons that flow through the circuit.
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9. There is high tide at the same place, at the coast, every (twelve)/ (six) hours.
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10.The Moon’s mass is much (less)/ (much) more than Earth’s mass.
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QUESTION 2 – MATCH THE COLUMNS (10)Match the definition given in Column A, with the correct word/words in Column B. Write
only the letter next to the number.
Column A Column B1. Non-renewable source of energy2. Renewable source of energy.3. Type of energy found in gas.4. Energy produced when turbine turns.5. Large, metal towers that carry
electricity to our homes.6. White mussels live in the wet sand
and they put up two little tubes called _____ for breathing.
7. Temporary phenomena on the surface of the sun.
8. Predictable, repeated rise and fall of sea and ocean levels.
9. Large kind of seaweed that grows mostly in cold sea water.
10.A circle of twelve constellations seen at certain times of the year.
A. WindB. Potential energyC. PylonsD. CoalE. Mechanical energyF. Thermal energyG. TidesH. ZodiacI. EclipticJ. KelpK. SunspotsL. Sun stripesM. Ocean risesN. Steel frames
1 2 3 4 5 6 7 8 9 10_______________________________________________________________________
QUESTION 3 – CLASSIFY ENERGY SOURCES (10)Classify each of the following energy sources as either renewable or non-renewable and
list what the image is or what type of energy is being shown in the images.
A. Is it renewable/non-renewable?
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What is it/where is energy used?
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B. Is it renewable/non-renewable?
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What is it/Where is energy used?
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C. Renewable/non-renewable?
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What is it/Where is energy used?
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D. Renewable/non-renewable?
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What is it/Where is energy used?
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E. Renewable/non-renewable
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What is it/Where is energy used?
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QUESTION 4 – TRUE OR FALSE (10)Say whether the following statements are TRUE or FALSE. If FALSE, correct it, to make it
TRUE.
1. One would be able to jump and throw balls higher and further on the Moon, that on
the Earth.
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2. The energy of the Sun is transferred to Earth by absorption.
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3. Efficiency, means being able to do “less with more”.
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4. When fluid (liquid) is warmed up, the particles move around more quickly.
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5. If you put a frying pan on a stove, the pan will be hot in about a half an hour.
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6. Some substances, like plastic and wood, are poor conductors of heat.
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7. It takes the Moon, almost a month, 29,5 days, to orbit earth once.
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QUESTION 5 – DIAGRAMS (10)1. Study the diagrams below carefully and answer the questions that follow:
a) In which month is the Southern Hemisphere tilted towards the Sun? (1)
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b) Explain why the Sun’s rays strike different places on Earth at different
angles. (2)
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c) How does the Sun’s energy Support life on Earth? (3)
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2. Study the diagram below to answer the questions. (4)
a) Which line runs horizontally across the Earth at 0°? (1)
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b) Is the Earth receiving oblique or direct sunrays? (1)
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c) What is the size of the angle of the line seen from the North to the South
Pole. (1)
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d) Where is the Arctic circle situated? (1)
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QUESTION 6 – DEFINITIONS (10)
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Define each of the following terms:
1. Global warming (2)
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2. Biofuel (2)
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3. Mass (2)
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4. Sandy shore ecosystems (2)
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5. Solar Energy (2)
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QUESTION 7 – FACTS AND SHORT PARAGRAPHS
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Answer the short questions and paragraphs.
1. Explain what makes it possible for the fire to keep the room in the house
warm? (2)
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2. What is radiation? (2)
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3. Give one other example of how and where radiation can occur, and explain. (2)
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4. Why is a fireplace, placed at the bottom of a room and not near the ceiling? (2)
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5. Explain the general function of insulating materials in and around the house. (2)
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6. Explain the Law of Conservation briefly. (3)
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7. Give any 3 (three) facts of oil or what you know about oil. (3)
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8. Draw/explain the Input, the Process and the Output, and mention the wasted
energy in the image below.
(4)
INPUT PROCESS OUTPUT
WASTED ENERGY
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QUESTION 8 – DRAWINGS AND EXPLANATIONS (10)8.1 Draw a diagram to show the alignment of the Moon, Earth and Sun at Full Moon.
Label each object clearly.
(3)
1. What are moons? (1)
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2. The moon has an effect on the ________________________ (1)
8.2
1. What is meant by the word solstice? (1)
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2. What is a tidal bulge? (2)
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3. What does the word equinox mean? (1)
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4. Explain the summer solstice. (1)
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NOW GO BACK AND CHECK YOUR WORK!TOTAL : 100